Improvement in saw-mill carriages



H. GROVES. Saw-Mill Carriage.

No. 203,908. Patent ed May 21,1878

UNITED STATES PATENT OFFICE.

HENRY GROVES, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN SAW-MILL CARRIAGES.

Specification forming part of Letters Patent No. 203,908, dated May 21,1878 application filed March 11, 1878.

To all whom it may concern:

Be it known that I, HENRY Gnovns, of Indianapolis, in the county ofMarion and State of Indiana, have invented a new and useful Improvementin the Mode of Operating Saw-Mill Carriages, of which the following is adescription, reference being had to the accompanying drawing.

My invention relates to a new device for operating saw-mill carriages.

The object of my invention is to operate the carriage of a saw-mill witha POSIlJIKG motion without the aid of racks and pinions.

My invention consists of the new construction, arrangement, andapplication of devices, and in the new combination of old elements, allof which combined are deemed essential in my newly-organized device foroperating a saw-mill carriage, as will be hereinafter fully set forth.

In the drawing, in which like letters of reference indicate like parts,Figure 1 is a plan view of a saw-mill carriage mounted on its guides,showing my improved mode of operating the same. Fig. 2 is ahorizontalvertical section of the same.

A A represent the side sills or guides, on which the carriage B B O O ismounted. The shafts D, G, and I extend across from side to side of thesills A A, and are supported in suitable journal-boxes attached to saidsills.

The center shaft D projects beyond the sill A, and is revolved by any ofthe ordinary connections with a power mechanism. On said shaft issecured a long drum, E, provided with a stud, pin, or bolt, f.

The shafts G and I are provided with loose grooved sheaves H, J, K, andM, in the manner shown in Fig. 1

At the front of the carriage are secured boxes P P, in which the shaft 0operates. Said shaft is provided with a crank end, 0?, and aratchet-wheel, R. p

The pawl a is pivoted to the frame of the carriage by the bolt b, andoperates, with the ratchet B, to hold the shaft 0 and prevent it fromrevolving.

The rope to is first secured to the rear end 0 of the carriage, andextends forward, passing over the loose sheave M,-thence back, over, andaround the loose sheave K, and then over the top of the drum E, on whichit is wound around several times and made fast to the stud f, afterwhich it has several more turns around said drum, and is then carriedforward under the sheave J, thence back under the sheave H, thenceforward, and is attached to the ratchet-shaft 0, where it is tightenedby means of a crank applied to the end (7, and the ratchet and pawl ahold the rope taut.

The operation of my improved device is as follows: Power being appliedto the drumshaft D, the drum revolves and winds up the rope to on oneside while it is being unwound on the other. The carriage B is movedalong the guide-sills Ain the direction in which the drum E revolves,and is reversed when the motion of the drum-shaft is reversed. If therope should become slack, it can be tightened on the shaft 0.

What I claim as new, and desire to secure by Letters Patent, is

The combination of the shafts G-and I, provided with loose sheaves H K JM, the drum E, the rope w, the movable carriage B O, and the shaft 0,provided with the ratchet R and the pawl a, all arranged and combined tooperate in the manner set forth and described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HENRY GRQVES. Witnesses:

E. O. FRINK, S. G. FRINK.

